Toughening agent for epoxy resin compositions
United States Patent(美国专利号):8927677
Abstract: A curable epoxy resin composition comprising (a) a liquid epoxy resin; (b) at least one curing agent selected from the group consisting of at least one anhydride; at least one phenolic novolac; at least one amine; or a mixture thereof; and (c) at least one high molecular weight poly(propylene oxide) polyol having the following chemical structure: ##STR00002## wherein the number average molecular weight of the poly(propylene oxide) polyol is about 7,000 to about 20,000 with n being from about 120 to about 345.
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